Bradley Hasbro Children's Research Center, Providence, Rhode Island, USA.
Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, Providence, Rhode Island, USA.
Subst Use Misuse. 2022;57(10):1572-1580. doi: 10.1080/10826084.2022.2096238. Epub 2022 Jul 6.
Although siblings are conceptualized as a salient social influence during adolescence, few studies have examined how adolescent siblings influence each other's substance use and risky sexual behavior. In this study, we investigated the influence of alcohol use days, cannabis use days, and cannabis and alcohol co-use days on the sexual risk behavior of siblings while accounting for dyadic influence.
At the baseline visit for a randomized controlled trial for adolescents referred due to parents' concerns about their substance use ("referred adolescents"; n = 99; M=15.95; 38.38% female), we assessed alcohol and cannabis use days as well as sexual risk behavior of the referred adolescents and their sibling (M=15.03; 51.52% female). We computed the number of days in the 30 days prior to the baseline that alcohol and cannabis use occurred on the same day. Using a cross-sectional actor partner interdependence model, we tested two models of how adolescents' substance use is associated with their own ("actor effect") and their siblings' ("partner effect") sexual risk behavior-one model for alcohol and cannabis use, and one model for daily co-use.
For referred adolescents and their siblings, within an individual, greater alcohol, cannabis, and daily co-use was significantly associated with sexual risk behavior (actor effects). Furthermore, more sibling co-use days was positively associated with referred adolescent sexual risk behavior (partner effect), representing interdependence.
These findings confirm the influence siblings have on one another's risky behavior in adolescence and have implications for prevention and intervention efforts for adolescent substance use.
尽管兄弟姐妹在青少年时期被视为重要的社会影响因素，但很少有研究探讨青少年兄弟姐妹如何相互影响彼此的物质使用和高危性行为。在这项研究中，我们调查了酒精使用天数、大麻使用天数以及大麻和酒精同时使用天数对兄弟姐妹性风险行为的影响，同时考虑了对偶影响。
在一项针对因父母担心其物质使用而被转介的青少年（“转介青少年”；n=99；M=15.95；38.38%为女性）的随机对照试验的基线访视中，我们评估了转介青少年及其兄弟姐妹的酒精和大麻使用天数以及性风险行为。我们计算了在基线前 30 天内，酒精和大麻在同一天使用的天数。使用横断面主体间依存模型，我们测试了两种模型，分别用于研究青少年物质使用与其自身（“主体效应”）和兄弟姐妹（“伙伴效应”）性风险行为之间的关系：一个模型用于酒精和大麻使用，另一个模型用于每日共同使用。
对于转介青少年及其兄弟姐妹，个体内更多的酒精、大麻和每日共同使用与性风险行为显著相关（主体效应）。此外，更多的兄弟姐妹共同使用天数与转介青少年的性风险行为呈正相关（伙伴效应），这代表了相互依存。
这些发现证实了兄弟姐妹在青少年时期对彼此危险行为的影响，对青少年物质使用的预防和干预措施具有启示意义。
